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Intangibles and Goodwill - Estimated Annual Amortization Expense (Details)
Oct. 31, 2016
USD ($)
Estimated annual amortization expense of intangible assets for next five years  
Nine month period ending July 31, 2016 $ 11,538,000
2018 15,129,000
2019 14,805,000
2020 13,056,000
2021 12,736,000
2022 $ 12,000,000